ʻO Diisocyanate (DDI) kahi diisocyanate aliphatic kū hoʻokahi me 36 carbon atom dimer fatty acid iwi kuamoʻo. Hāʻawi ke ʻano i ka DDI i ka maʻalahi a me ka hoʻopili maikaʻi aʻe ma mua o nā isocyanates aliphatic ʻē aʻe. Loaʻa iā DDI nā waiwai o ka haʻahaʻa haʻahaʻa, ʻaʻohe melemele, hoʻoheheʻe i ka hapa nui o nā mea hoʻoheheʻe organik, haʻahaʻa ka wai a me ka viscosity haʻahaʻa. ʻO DDI kahi ʻano Isocyanate hana ʻelua, hiki iā ia ke hana me ʻelua a ʻoi aku paha mau hui hydrogen ikaika e hana i ka polymer. Hiki ke hoʻohana ʻia ʻo DDI i ka propellant rocket paʻa, ka hoʻopau ʻana i ka lole, ka pepa, ka ʻili a me ka lole repellent, ka mālama ʻana i ka lāʻau, ka ipu uila a me ka hoʻomākaukau ʻana i nā waiwai kūikawā o ka polyurethane (urea) elastomers, adhesive a me sealant, etc.

Ma ka ʻoihana lole, hōʻike ʻo DDI i kahi manaʻolana hoʻohana maikaʻi loa i nā waiwai pale wai a palupalu i nā lole. ʻAʻole ia e pili i ka wai ma mua o nā isocyanates aromatic a hiki ke hoʻohana ʻia e hoʻomākaukau i nā emulsions wai paʻa.

ʻO ka hoʻohana ʻana o 0.125%DDI e hāʻawi i ka lole i kahi palupalu paʻa; ʻO nā lole i mālama ʻia me nā mea palupalu cationic ʻaʻole paʻa loa he like ka palupalu ma hope o 26 mau holoi. ʻO ka mea pale wai lole e hoʻohana ana i ka 1%DDI he like a ʻoi aku ka hopena pale wai e like me ka mea pale wai momona pyridine (hoʻāʻo AATCC).

Hiki i ka DDI ke hoʻomaikaʻi i ka hopena o ka mea pale wai a me ka mea pale ʻaila no nā lole fluorinated. Ke hoʻohana pū ʻia, hiki i ka DDI ke hoʻomaikaʻi nui i nā waiwai pale wai a me ka mea pale ʻaila o nā lole.

Ua hōʻike ʻia nā loiloi hoʻokolohua a me nā loiloi kahua he ʻoi aku ka maikaʻi o ke kūpaʻa ʻana o DDI i ka holoi ʻana a me ka hoʻomaʻemaʻe maloʻo ma mua o ka fluoride a i ʻole nā ​​​​mea hoʻohui lole e like me nā mea antistatic.

ʻO DDI, i hoʻomākaukau ʻia mai nā waikawa momona dimer, he ʻano isocyanate ʻōmaʻomaʻo maʻamau, bio-renewable. Ke hoʻohālikelike ʻia me ka isocyanate universal TDI, MDI, HDI a me IPDI, ʻaʻohe ʻawaʻawa a ʻaʻole hoʻoulu ka DDI. Me ke kaulana o nā mea maka dimeric acid ma Kina a me ka hoʻonui ʻana o ka nānā ʻana o ka poʻe i ka hoʻokele waiwai pale kaiapuni haʻahaʻa kalapona a me ka hoʻomohala hoʻomau, ua puka mālie mai ke koʻikoʻi o ka hoʻohana ʻana i nā mea maka bio-renewable e hoʻomākaukau ai i ka DDI, kahi mea nui e pono ai no ka hoʻolaha ʻana i ka hoʻomohala ʻana o ka ʻoihana polyurethane.